Why is CO2 bad for the environment?

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The greenhouse effect is often cited in a negative way as if it’s the worst thing in the world and we’re all going to die. This is not true. The greenhouse effect actually keeps us all alive. The Earth would be a big ball of ice if it were not for the greenhouse effect. The gases trap the sun’s warmth and keep the Earth nice and toasty so that life can be sustained on it.

The problem is that the warmth is increasing because humans are creating too many greenhouse gases and adding to what was naturally in the troposphere. With the additional gasses too much warmth is being trapped and the greenhouse effect is too strong, thus the danger. The thinking from scientists is that the extra CO2 human beings are producing will eventually cause the Earth to become so warm that sustaining life will be impossible.